Good documentation is essential for maintainable projects. Clear, up-to-date documentation helps teams onboard faster, reduces support burden, and ensures knowledge isn't lost when team members change.
Start with the Why
Effective documentation explains not just what something does, but why it exists and how it fits into the larger system. This context helps readers understand the reasoning behind decisions.
Keep It Current
Outdated documentation is worse than no documentation. Establish processes to update docs alongside code changes. Consider documentation as part of the definition of done for features.
Structure and Organization
Organize documentation logically with clear navigation. Use consistent formatting, include code examples, and make it easy to find information quickly. README files, API docs, and architecture diagrams each serve different purposes.